42 



growers. Application was made to various people interested for hel-p in 

 this connection. The Experiment Station agreed to purchase all fer- 

 tilizers and superintend their application. The owner of the field was to 

 furnish the labour, to cultivate it and receive the fruit when it had 

 ripened on the field. Under these conditions many acres of pineapples 

 were offered for experimental use. After making diligent inquiry into 

 the condition of the fields and of the soil, it was finally decided that a 

 field belonging to Ballentine & Moore, a mile north of Jensen, was the 

 most suitable for the experiment work. Accordingly the work was com- 

 menced on the field, which had been set out in pineapples the previous 

 July or August on recently cleared spruce pine land. Chemical analy- 

 sis of the "pineapple soil" indicates verj' strongly that all the essential 

 elements of fertility are v;anting in it. Consequently it was thought, 

 that no plots would produce a good crop with an incomplete fertilizer. 

 Therefore, the plots receiving an incomplete fertilizer were laid out in 

 hundredth-acres, and plots receiving complete fertilizers were laid out 

 in twentieth-acres. As many forms of nitrogen as were common on 

 the market were secured ; also of potash, bone meal and dissolved 

 Florida phosphate. Each form of nitrogen was combined with each 

 form of potash and conversely. The phosphoric acid was used in this 

 connection as extensively as the fund would permit. 



The fertilizers used gave approximately the following formula : 



Nitrogen ... ... ... ... 3 per cent. 



Potash ... ... ... ... 7 percent. 



Available phosphoric acid .. ... 5 percent. 



The following amounts of fertilizers were applied February 7 and 

 S, 1898. A second application of two and a half times that amount was 

 made June 27 and 28. 1898. A third application of one and a half 

 times the amount was made November 4 to 12, 1898, at which time 

 the photographs were taken. 



Plot. Ipgrredients. Libs, per Acre. 



1 I Cotton 8eed Meal . . 800 



2 I Cotton fceed Meal . . 800 

 I Sulphate Potash, low grade 400 



3 I Cotton Seed Meal . - 160 



Sulphate Potash, low grade 400 

 I Bone Meal . . 1,600 



4 I Cotton Seed Meal . 160 

 I Rone Meal . . 1.P00 



5 I Cotton Seed Meal . . buu 

 I bulphate Potash, low grade 400 

 I Acid Phosphate . . 600 



6 I Cotton Seed Meal . 800 

 I Acid Phosphate . . 600 



7 j Cotton Seed Meal . . 800 

 I Muriate Potash . . 200 



8 I Cotton Seed Meal I 160 

 I Muriate Potash . . 160 

 I Bone Meal . 1.600 



9 1 Cotton Seed Meal . . 800 

 i Muriate Potash . . 160 

 i Ai.'W I^liospbMte . . 600 



Plot. Ingredients. Lbs, per Acre. 



10 1 Cotton Seed Meal . 

 1 Kainit 



. 800 

 . 800 



11 1 Cotton Seed Meal . 

 1 Bone Meal 

 1 Kainit 



. 160 



1,600 

 . 800 



12 1 Cotton Seed Meal - 

 1 Kainit 



1 Acid Phosphate 



. 800 

 . 800 

 . 600 



13 1 Cotton Seed Meal . 

 1 Pot.. Mag., Garb 



. 800 

 . 500 



14 1 

 1 



Cotton Seed Meal 

 Pot., Mag., Carb . 

 Bone Meal 



. 800 

 . 500 

 1,600 



15 1 



Cotton Seed Meal 

 Pot., Mag., Carb 

 Acid Phosphate 



. 800 

 . 500 

 . 600 



16 



Cotton Seed Meal . . 800 

 Sulphate Potash, high grade 200 



17 



Cotton Seed Meal . . 160 

 Sulphate Potash, high grade 160 

 ; Bono Meal . . 1,600 



